Stamping mechanism.



0. G. FURMAN. STAMPING MECHANISM. APPLICATION FILED JUNE 4, 1912.

Patented Sept. 16, 1913.

UNITED STATES PATENT. OFFICE.

current e. roman, F mnemnro'n, NEW Yank, ASSIGNOR we mm o. xmrr, or new roan, n. Y.

Specification of Iletters Patent.

. STAMPING MEGHANISM.

Application filed June 4, 1912. Serial 1T0. 701,514.

To all whom, it may concern Be it known that I, CLIFFORD G. F'URMAN,

' of Bintghamtoncounty of Broome, and

State 0 New York, have invented new and useful Improvements in Stamping Mechanism, of which the following is a specifica- My invention relates to improvements in stamping mechanism and involves particularly improved construction and operation of a stamp bar carried bodily by actuating mechanism to impress signal indicating marks on record material such as tape. The stamp bar has a reservoir for containing ink and at one end has a stamping head provided with a stamp pad, together with improved means for feeding the ink from the reservoir t8 the pad. The ink used in stamp bars of this class is thick and sticky'and will not readily flow.

Animportant object of the'invention is therefore to provide inertia controlled mechanism in the form of a weighted piston structure operating in a cylinder and cooperating with a valve seat, the operation being such that when the stamp bar is suddenly moved toward record receiving material the inertia of the weighted pistonstrucvture will cause sudden separation of the piston head and the valve seat so that the vacuum or suction produced will cause ink to fill in below the piston head, and when the stamp bar is brought into collision with the record receiving material the momentum acquired by the weighted structure will cause the 'piston head to be thrown toward the valve seat so quickly that the ink previously drawn below the iston head will be forced through, a suitab e duct and to the pad. After each delivery of ink the piston head will rest upon its seat and will prevent the further flow of ink until the stam 'frame is again suddenly moved downward y.

Another object of the invention is to provide construction which will cushion the impact of the piston head against the valve seat, the piston head being provided with a block of cushioning material such as rubber. This cushioning block will also more intimately engagewith the valve seat and leakage will be prevented. I

' Another object of my invention is to pro- 'vide a stamping mechanism. in which there,

will be an assured flow of-ink delivered to Another object of my invention is to pro-.

Patented Sept. 16, 1913.

vide a stamping mechanism which can be easily and economically manufactured, and one which will not requireirequent readjustment nor the attention of a skilfulperson to keep it inproper working condition. In order that the invention may be better understood attention is directed to the accompanying drawings, forming part of this specification, and in which Figure 1 is a front elevational view of one form of actuating mechanism with which my improved form of stamping bar may be associated; Fig. 2 is an enlarged elevational view of the stamping bar, and Fig. 3 is a sectional View taken from plane 3-3, Fig. 2.

The frame of the stamping bar comprises a reservoiro for ink, a head 6, and a tube 7 connecting the reservoir and head. The head 6 has the cylindrical lug 8 extending from the top thereof, and through the head extends a duct 9 for conveying ink to the pad 10 carried in the pocket 11 in the lower face of the head. The top of the lug 8 is preferably conical to form a circular seat 12 about the inlet of the duct 9. Extending through the tube 7 and reservoir 5, and guided by the upper and lower walls of the reservoir, is a stem 13 which terminates at its lower end in a piston head 14 faced with a valvepad or block-15, preferably of soft rubber, both the piston head and padbeing of slightly less diameter than that of the tube 7. A spiral spring. 16 encircling the stem and abutting against the head 14: and

the lower end of the reservoir, tends to press the valveor block against the seat to prevent tlow of ink from the tube to the duct 9. The upper-end of the valve stem carries the head 17 whose weight is so proportioned relative to the power of spring 16, that when the stamp bar moved downwardly suddenly from a state of rest the inertia of the weighted piston structure will cause this structure to be left behind. As the valve seat is thus suddenly carried away fromthe piston structure, the vacuum or suction produced below the piston head will cause the ink to fill in below the piston head, and when the stamp frame is then brought into collision withthe record receiving material, the momentum acquired by the weighted structure will cause it to be thrown forcibly against the valve seat so that the ink which had filled in below the piston head will be forced throughthe duct 9 and to the pad 10 before it has timeto get back past the piston head 14 and block 15 to the ink reservoir. The rubber block 15 will cushion the impact with the'valve seat and the valve seat will therefore not be injured and furthermore the operation will be noiseless. During upward movement of the stamp structure the piston structure will remain on the valve seat and flow of ink will be prevented and the rubber block will intimately engage with the seat to prevent any leakage. Thus when the stamp bar is at rest flow ofink is prevented and when the stamp bar is thrown downward suddenly the created suction will cause feeding of a charge of ink which is then forced to the stamp pad to be"applied to the record receiving material. The stamp pad 10 is preferably backed by a metal strip 18 and .is adjustable within its pocket by means of'set screws .19 passing through the head 6 and into engagement with the strip.

My improved. form of stamp bar can of course be used in connection with any actuating mechanism which will cause rapid vertical vibration thereof. In Fig. 1, I have shown it in connection with actuating mechanism substantially like that disclosed in Patent 726,882 ranted May 5, 1903, to H. W. Doughty an O. E. Beach. In the mechanism, a ratchet wheel 20 is driven by a suitable sprin 21 and this ratchet wheel is normally held by a detent arm 22, extending from a frame 23 pivoted at 24 and carrying at its other end the armature structure 25 associated with the electro-magnet 26, which, in service, is connected in a signaling circuit to respond to current changes therein. A

bell crank shaped lever is pivoted at its elbow to the frame 23, one arm thereof being associated with the :electro-magnet and the detent arm 27 thereof being adapted'to cooperate with a bar 28. The pin 29 extending from the armature'structure cooperates with set screws 30 to limit the swin thereof. When the armature is energized, t e frame 23 is held up and the ratchet wheel 20 isv locked bydetent 22, and when the electromagnet releases the armature structure, the

" arm on frame 23 falls and detent 22 releases wheel 20.

A shaft 31 has an upwardly extending to which is pivoted a pawl 33 whose end engages with the teeth of wheel 20. Also extending from the shaft 31 is an arm 34 terminating in a shoe 35, adapted to cooperate with the end of arm '36 extending upwardly from frame 23. The shaft 31 also has a downwardly extending arm 36, pivoted toan end of a connecting rod 37 whose other end connects with one arm of the bell crank lever 38 pivoted at its elbow. The other arm of the bell crank lever pivots at its end to the-upper lug 39 provided on the tube 7 .of the stamp bar. Below the lever 38 an arm 40 is pivoted at one end and at its other end is pivoted to the lower lug 41 on the stamp bar. When the electro-magnet releases frame 23, wheel 20 is released and through the pawl 33, the shaft 31 will be suddenly turned in clockwise direction so that the stamp bar is given a quick downward .throw. A compression spring 42 tends to raise the pawl 33, but normally a cam ridge 43 on the pawl abuts against a post 44 to hold the pawl in looking engagement with the wheel 20. However, when the wheel is released, the ridge 43 is moved away from the post 44, but the frictional engagement between the pawl 33 and a tooth of the Wheel 20 prevents the spring-42 from raising the pawl until the shoe 35 has so' acted upon the end of the lever 36 as to raise the left-hand end of the frame 23 and restore detent 22 in locking engagement with the wheel 20, whereupon the rotation of the wheel 20 will be arrested, and the momentum of the parts carried or driven by the shaft 31 will cause sufficient additional rotation of said shaft to permit the spring 42 to disengage the pawl 33 from the wheel 20, whereupon all parts will be returned to their normal positions through the gravitating action of a weight (not shown). When the left-hand end of the frame 23 is raised by the action of the shoe 35, as just described, said frame will be caught and electro-magnetically held in its upper position if the magnet 26 is then energized. If the magnet 26 is not then energized, the frame will be held by virtue of the engagement of the detent arm 27 with the bar 28. Then,when the electromagnet is again energized,-the armature structure will be rotated to release the detent arm from the bar 28and the frame 23 will be held electro-magnetically in its upward position, and-the mechanism will be ready to operate upon the next opening of the circuit. During the rapid vertical vibrations of the stamp bar, the bar will operate as before described. Over a suitable support 45, a record tape 46 is caused to travel by suitable mechanism and receive the impressions from the stamp bar pad.

. I do not, of course, the precise construction and operation of the 2 stamp bar mechanism, -nor to the particular adaption thereof shown, as. changes and modifications are possible which will still come within the scope of the invention, and i I therefore claim the following:

. 1. Ina stamping bar, the combination of a". stamping head,- an ink reservoir, a tubular member connect-ing said head and reservoir, said'head having'a feed duct communicating with said tubular member, a piston head movable withinsaid tubular member to close and to open the inlet of said duct, there being passageway between said piston head and the walls of, said tubular member for the passage of ink, said piston head bein weighted, whereby upon sudden downward movement of said stamp bar the inertia of the weighted piston will cause said pistonto lag to thus create vacuum or suction between said piston head and duct inlet so that ink'thereupon drawn into the space between said piston and said duct inlet will be forced into and through said duct when the piston head again moves toward the duct.

2. In a stamping bar, the combination of a frame comprising a reservoir and a head and a tubular member connecting said reservoir an'd'head, said head having a duct for receiving ink from said tubular member, said head adjacent the inlet of said duct forming a valve seat, a piston head movable within said tubular member and acting as a valve for cotiperating with said peat, there being restricted passageway be tween said piston head and the walls of said tubular member for the passage of ink, said piston head being wei hted whereby upon sudden vertical movement of said stamping bar frame the inertia of said piston head will cause it to act as a pump to force ink from said tubular member into x' aid duct.

3. In a stamping bar, the combination of a frame comprising a reservoir and a fitamping head and a tubular member con-' meeting said reservoir and head, said head having a duct and the material of said head adjacent the inlet of said duct'formingla valve seat, a. piston head movable wit said tubular member and acting as a valve forcoiiperating with said seat, there being restricted passageway between said piston head and the walls of. said tubular member, said piston head normally engaging said seat to prevent flow of ink from said tubular member to said duct, said piston head being sufliciently weighted so that upon sudden downward movement of said frame, said seat and piston head will he suddenly separated to cause vacuum or suction effect below said piston head to thereby cause How of ink into a space between said piston head and seat, said piston head then acting to force the accumulated inkthrough saidduct.

4. In a stamping bar, the combination of a frame comprising a reservoir and a stamping head and a tubular member connecting tubular member and acting as avalve for cotiperating with said seat, there being restricted passageway between said piston and the walls of said tubular member, said piston head normally engaging said seat to prevent How of ink from said tubular member to said duct, said piston head being sufiiciently weighted so that upon sudden downward movement of said frame said seat and piston head will be suddenly separated to cause vacuum or suction effect below said piston head to thereby cause flow of ink into the space between said piston head and seat, said piston head then acting to force the accumulated ink through said duct, and a facin of yielding material for said piston head %o of said head against said seat.

'5. In a stamping bar, the combination of a frame comprising a stamp head and a tu- 'bular' member extending upwardly therea feeding duct for receiving ink from said tubular member and the material of said head adjacent the duct inlet forming a.

valve seat, apiston movable in said tubular member and acting as a valve for cooperating with said seat, means tending to hold said piston against said seat, th ere being restricted passageway between said piston and the walls of said tubular mem her for the flow of ink, said piston being weighted whereby u on sudden downward movement of said ame said piston and valve seat will be suddenly separated to cause vacuum or suction efl'ect below said piston to thus cause flow of ink to the space between said piston and seat, and

whereby when said piston moves to engage, with the seat upon stopping of the frame, the accumulated ink will be forced through said duct.

6. In a, stamping bar, the combination of a stamping head, an ink reservoir, there being an opening from the reservoir through the stampinghead, a valve seat surrounding said openmg, a spring controlled valve coiiperating with said seat, and inertia controlled means operating to force ink through said opening. r

7. In a stamping bar, the combination of an ink reservoir, a stamping head, an ink pad carried by said head, a tube connecting said ink pad with said reservoir, a valve seat where said tube enters said reservoir, a spring controlled valve cooperating with said seat to close said tube, and inertia controlled means operating to force ink through said tube. 1

8. In a stamping bar, the combination of a stamping head, an ink reservoir, there be ing an opening from the reservoir through the stamping head, avalve seat surrounding said opening, a spring controlled valve cooperating with said seat, said valve having a facing of elastic material, and inertia controlled means operating to force ink through said opening.

9. In a stamping bar, the combination of a stamping head, an ink pad carried by said head, an ink reservoir, a tube connecting said pad with said reservoir, a spring controlled valve operating to close saidtube, and inertia controlled means operating to open said valve and then to force ink through said tube.

10. In-a stamping bar, the combination of a stamping head, an ink pad carried by said head, an ink reservoir, a supply tube connecting said pad with said reservoir, a normally closed spring controlled valve in said tube, and inertia controlled means operating first-to-open said valve, second -to tube, and third to close said valve.

11. In a stamping bar, thecombination of a stamping head, an ink pad carried by said head, an ink reservoir, a tube connecting said pad with said reservoir, a spring controlled valve operating to close said tube, said valve having a facing of elastic material, and inertia controlled means o-p erating to open said valve and. then to force ink through said tube.

In Witness whereof, I hereunto subscribe my name, this 28 day of May, A. D., 1912.

CLIFFORD Gr. FURMAN.

Witnesses:

H. FJHOLTON, H. N. PURPLE. 

